<template>
    <div id="root">
        <div class="todo-container">
            <div class="todo-wrap">
                <MyHeader @addTodo="addTodo"></MyHeader>
                <MyList 
                    :todos="todos" 
                    :checkTodo="checkTodo"
                    :deleteTodo="deleteTodo">
                </MyList>
                <MyFooter
                    :todos="todos"
                    @checkAllTodo="checkAllTodo"
                    @clearAllTodo="clearAllTodo">
                </MyFooter>
            </div>
        </div>
    </div>
</template>

<script>
    import MyHeader from './components/MyHeader.vue';
    import MyFooter from './components/MyFooter.vue';
    import MyList from './components/MyList.vue';

    export default {
        name:"App",
        components:{
            MyHeader,
            MyFooter,
            MyList
        },
        data() {
            return {
                todos:[]
            }
        },
        //数据在哪里，操作数据的方法就在哪里
        methods:{
            addTodo(todoObj){
                this.todos.unshift(todoObj);
            },
            checkTodo(id){
                this.todos.forEach((todo)=>{
                    if(todo.id === id){
                        todo.done = !todo.done;
                    }
                })
            },
            deleteTodo(id){
                this.todos = this.todos.filter((todo)=>{
                    return todo.id !== id;
                })
            },
            //全选或取消全选
            checkAllTodo(done){
                this.todos.forEach((todo)=>{
                    todo.done = done;
                })
            },
            //清楚所有已经完成的todo
            clearAllTodo(){
                this.todos = this.todos.filter((todo)=>{
                    return !todo.done;
                })
            }
        }
    }
</script>

<style>
    /*base*/
    body {
        background: #fff;
    }

    .btn {
        display: inline-block;
        padding: 4px 12px;
        margin-bottom: 0;
        font-size: 14px;
        line-height: 20px;
        text-align: center;
        vertical-align: middle;
        cursor: pointer;
        box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
        border-radius: 4px;
    }

    .btn-danger {
        color: #fff;
        background-color: #da4f49;
        border: 1px solid #bd362f;
    }

    .btn-danger:hover {
        color: #fff;
        background-color: #bd362f;
    }

    .btn:focus {
        outline: none;
    }

    .todo-container {
        width: 600px;
        margin: 0 auto;
    }
    .todo-container .todo-wrap {
        padding: 10px;
        border: 1px solid #ddd;
        border-radius: 5px;
    }

</style>

